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參數(shù)資料
| 型號(hào)： | AWT6111 |
| 廠商： | ANADIGICS, Inc. |
| 英文描述： | CDMA/AMPS Power Amplifier |
| 中文描述： | 碼分多址/ AMPS二元功率放大器 |
| 文件頁(yè)數(shù)： | 3/4頁(yè) |
| 文件大小： | 79K |
| 代理商： | AWT6111 |
Application Note - Rev 0
04/2002
AWT6111
3
Minimum Bench Requirements
The following minimum equipment is required for
proper power amplifier operation.
1. Spectrum Analyzer
2. Three power supplies
3. CDMA function generator
4. RF filter (Surface Acoustic Wave-SAW)
5. Isolator
6. RF power meter
7. Coupler(s)
Turn On Procedures
Upon receiving the amplifier, the characterization
sheet should be reviewed for the appropriate bias
conditions. Review the evaluation board drawing
prior to connection of the proper bias pins on the
application board.
1. Be sure to connect the amplifier to 50
RF in/
out cables.
2. No RF power should be applied to the amplifier
prior to biasing.
3. Attach V
CC1
and V
CC2
first; then V
REF
and V
MODE
.
4. Turn the V
REF
supply to +2.85 V. Observe current
draw of approximately 5 mA.
5. Turn on the V
CC1
and V
CC2
supply to +3.5 V.
Observe current of ~100 mA from V
CC
supply.
6. Turn on RF power applying +5 dBm. Gradually
increase until the appropriate power level is
obtained from the output (28.5 - 29 dBm in
digital mode, 31 dBm in analog mode).
7. Perform measurements.
Layout Considerations
A sufficient number of holes (QTY 12 - 0.2mm
diameter plated through hole) should be placed
under the module in order to channel the heat
properly. In addition, contact should be made
between the PA slug located under the amplifier and
the board. For hand assembly of the board, place
sufficient bonding paste so that contact is made
between the PA and ground. For large volume
assembly, please refer to the solder profile
recommendations application note. For RF in and
out provide 50
transmission lines.
Other Recommendations
In order to maximize performance in a CDMA system,
the AWT6111 achieves full output power (+28.5dBm
in digital mode and +31dBm in analog mode) while
operating in low power mode. This minimizes
quiescent current (47 mA typical) and eliminates
the need for mode switching between high and low
power or between analog and digital modes of
operation. Applying logic low (0 V) to both V
REF
and
V
MODE
pins, places the amplifier in shutdown
(standby) mode. To minimize external switch
requirements, the V
REF
and V
MODE
lines can be tied
together. I
MODE
is only ~300 uA, therefore tying it to
the V
REF
line doesn’t significantly increase the
current requirements on the switched line.
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